Theresa Weston, Ph.D., leads building science and construction technology research for DuPont Performance Building Solutions as a DuPont Fellow. She has developed and introduced to market many new products and is an inventor of four U.S. patents. Dr. Weston is a member of the executive committee of the ASTM Committee on the Performance of Buildings and chairs the Sub-Committee on Air Leakage and Ventilation. At ASHRAE, she is the immediate-past-Chair of the Residential Buildings Committee and immediate past-Chair of the Standard for Energy Efficient Design of New Low-Rise Residential Buildings (90.2) and a past chair of the Technical Committee on Building Materials and Building Envelope Performance. Dr. Weston is active in the ICC code development process. She is also active in publishing technical papers and presenting at construction industry and building science conferences.